A028952 Numbers represented by quadratic form with Gram matrix [ 3, 1; 1, 4 ].

0, 3, 4, 5, 9, 12, 15, 16, 20, 23, 25, 27, 31, 33, 36, 37, 44, 45, 48, 55, 59, 60, 64, 67, 69, 71, 75, 80, 81, 89, 92, 93, 97, 99, 100, 108, 111, 113, 115, 124, 125, 132, 135, 137, 141, 144, 147, 148, 155, 157, 159, 165, 176, 177, 179, 180, 181, 185, 188, 191, 192

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

Comments

Nonnegative integers of the form 3*x^2 + 2*x*y + 4*y^2, discriminant -44. - Ray Chandler, Jul 12 2014

Links

• N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

Crossrefs

Primes: A106282.

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Mar 29 2000